In this paper, some properties of dispersion curves in general isotropic piecewise homogeneous waveguides are rigorously derived. These properties are leveraged in a numerical implementation capable of determining the dispersion curves of such waveguides with cross-section materials that can be highly conductive (such as copper). In a numerical example, the influence of a lossy shielding conductor on the complex modes of a shielded dielectric image guide is investigated for the first time.

@article{4228058,
abstract = {In this paper, some properties of dispersion curves in general isotropic piecewise homogeneous waveguides are rigorously derived. These properties are leveraged in a numerical implementation capable of determining the dispersion curves of such waveguides with cross-section materials that can be highly conductive (such as copper). In a numerical example, the influence of a lossy shielding conductor on the complex modes of a shielded dielectric image guide is investigated for the first time.},
author = {Dobbelaere, Dieter and Rogier, Hendrik and De Zutter, Dani{\"e}l},
issn = {0018-9480},
journal = {IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES},
language = {eng},
number = {9},
pages = {3161--3168},
title = {Properties and numerical solutions of dispersion curves in general isotropic waveguides},
url = {http://dx.doi.org/10.1109/TMTT.2013.2273760},
volume = {61},
year = {2013},
}